References
- National Bureau of Statistics of China. 1990. Month distribution of newborn babies, China Population Statistics Yearbook. pp. 546–549 https://data.cnki.net/download/excel?filecode=N2005120414000174
- Xiong W, Hao Y, Han L, Wang M, He J. 2020. Associations between birth season and the anatomic subsites of gastric cancer in Beijing, China. Chronobiol Int. 1–8. doi:https://doi.org/10.1080/07420528.2020.1792481